EP0778016B1 - Bed apparatus - Google Patents

Bed apparatus Download PDF

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Publication number
EP0778016B1
EP0778016B1 EP96117078A EP96117078A EP0778016B1 EP 0778016 B1 EP0778016 B1 EP 0778016B1 EP 96117078 A EP96117078 A EP 96117078A EP 96117078 A EP96117078 A EP 96117078A EP 0778016 B1 EP0778016 B1 EP 0778016B1
Authority
EP
European Patent Office
Prior art keywords
plate portion
raising
frame
hip
base plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96117078A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0778016A3 (enrdf_load_stackoverflow
EP0778016A2 (en
Inventor
Yoshio Oguma
Akihiro Midorikawa
Tetsuya Waku
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
France Bed Co Ltd
Original Assignee
France Bed Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by France Bed Co Ltd filed Critical France Bed Co Ltd
Publication of EP0778016A2 publication Critical patent/EP0778016A2/en
Publication of EP0778016A3 publication Critical patent/EP0778016A3/xx
Application granted granted Critical
Publication of EP0778016B1 publication Critical patent/EP0778016B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/015—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame divided into different adjustable sections, e.g. for Gatch position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/46—Rod end to transverse side of member
    • Y10T403/4602—Corner joint

Definitions

  • the present invention relates to a bed apparatus having a base plate, on which a mattress is placed, and which is arranged to be moved vertically to raise the upper half of the body of a user.
  • a bed apparatus for a patient includes a so-called "reclining type bed apparatus" which is capable of facilitating a user whose strength has been declined to, for example, have a meal.
  • the reclining-type bed apparatus has a structure formed such that a base plate disposed on a bed frame is divided into a plurality of plate sections in the lengthwise direction of the bed frame; and a portion of the plate sections corresponding to the upper half of the body of the user, that is, a back raising portion, is enabled to be reclined by a drive mechanism.
  • the mattress placed on the base plate is bent while pressing the back side of the user. Since the mattress has a predetermined thickness, compressive force is generated in the upper portion of the inner portion of the mattress in a lengthwise direction toward the inside portion thereof when the mattress is bent by raising the back raising plate. On the other hand, tension is generated in the lengthwise direction in the lower portion of the mattress which is the outer surface of the bent mattress.
  • the compressive force generated in the upper portion of the mattress acts on the back of the user whose upper half of the body is raised while being pressed by the top surface of the mattress. Therefore, the back is pressed downwards by the compressive force and thus the hip and the femoral region are pressed rearwards (in a direction toward the back raising plate). As a result, the hip is held by the mattress and pressed excessively.
  • an object of the present invention is to provide a bed apparatus capable of eliminating an indisposition and pain of a user by forming the structure such that the compressive force generated in the upper portion of the mattress when the mattress is raised does not easily act on the back of a user.
  • a reclining type bed apparatus capable of raising the upper half of the body of a user, comprising:
  • FIGS. 1 to 19 A first embodiment of the present invention will now be described with reference to FIGS. 1 to 19.
  • FIG. 1 is an exploded perspective view of a reclining type bed apparatus having a base frame 1.
  • the base frame 1 is formed by a pair of long frames 2 and short frames 3 disposed in a rectangular configuration and connected by first connection members 4 at the adjacent ends thereof.
  • the long frame 2 and short frame 3 are square pipe members.
  • the first connection member 4 is, as shown in FIGS. 5 and 6 and by aluminum dicast, formed by integrating a first insertion portion 5 into which an end of the long frame 2 is inserted, a second insertion portion 6 into which an end of the short frame 3 is inserted, an attaching portion 7 of a elevation mechanism 11 to be described later and formed to rotatively support second arms 19a and 19b, and an attaching hole 9 into which an attaching shaft 8a of a caster 8 having a stopper is inserted and secured, the attaching shaft 8a having the stopper which is capable of holding the base frame 1 in such a manner that the base frame 1 can be moved and the same can be held to inhibit the movement of the base frame 1.
  • the long frame 2 and short frame 3 can be connected to form the rectangular shape. Note that the ends of the long frames 2 and the short frame 3 inserted into the insertion portions 5 and 6 are secured by screws 10.
  • the foregoing elevation mechanism 11 is provided for the base frame 1.
  • the elevation mechanism 11 has a power source 12, as shown in FIG. 1.
  • a drive shaft 13 is attached to the power source 12, the drive shaft 13 being arranged to be moved in the axial direction by the power source 12.
  • the leading end of the drive shaft 13 is, through a first bracket 15, movably supported at an intermediate portion of the synchronous rod 14.
  • An end of the synchronous rod 14 and another end of the synchronous rod 14 respectively are movably supported by first arms 17 respective provided at intermediate portions of the rotational shafts 16a and 16b.
  • a second bracket 18 is disposed at an intermediate portion of one of the first arms 17 to make a predetermined angle from the first arm 17 in the circumferential direction of the rotational shaft 16a.
  • the power source 12 is rotatively attached to the second bracket 18. Note that an end of the synchronous rod 14 is movably supported through a synchronous member 20 with respect to the other first arm 17.
  • a second arms 19a is secured to the two ends of one of the rotational shafts 16a, while an intermediate portion of an another second arms 19b is secured to the two ends of the other rotational shaft 16b.
  • a support shaft 21 is provided for anther end of each of the second arms 19a and 19b. The support shaft 21 is inserted into a groove portion 7a formed by opening the top end portion of an attaching portion 7 formed in the first connection member 4.
  • a stopper pin 22 is provided at the opened end of the attaching portion 7 in a direction traversing the groove portion 7a. The stopper pin 22 inhibits separation of the support shaft 21 from the groove portion 7a.
  • the elevation mechanism 11 having the above-mentioned structure, when the power source 12 is turned on so that the drive shaft 13 is moved in the projecting direction, the synchronous rod 14 is moved in a direction indicated by an arrow shown in FIG. 1. As a result, the pair of the rotational shafts 16a and 16b are rotated clockwise as indicated by arrows shown in FIG. 1. When the rotational shafts 16a and 16b are rotated, the second arms 19a, 19b are synchronized with the rotation above.
  • An elevating frame 31 arranged to be moved vertically by the elevation mechanism 11 is disposed above the base frame 1.
  • the elevating frame 31 is, similarly to the base frame 1, formed by disposing two long rods 32 and short rods 33 in the form of a rectangular shape such that their adjacent ends are connected to each other by second connection members 34.
  • the second connection member 34 is formed into a rectangular shape divided into an upper member 35a and a lower member 35b, as shown in FIG. 8. By joining and securing the members 35a and 35b by screws or the like, the second connection member 34 is formed.
  • the second connection member 34 has a first insertion portion 36 into which the long rod 32 is inserted and a second insertion portion 37 which is disposed perpendicular to the first insertion portion 36 and into which the short rod 33 is inserted.
  • the second connection members 34 each having the above-mentioned structure project over the two widthwise ends of the elevating frame 31.
  • third brackets 41 are suspended from the inner surface of each long rod 32 of the elevating frame 31.
  • Each of the third bracket 41 has a through hole 41a, as shown in FIG. 7.
  • a support shaft 43 projecting over a pressing plate 42 is inserted into the through hole 41a.
  • the support shaft 43 is inserted into a support hole 44 formed in an end portion of the rotational shaft 16a and a support hole 47 of a pipe member 46 formed in an end portion of the rotational shaft 16b.
  • the pressing plate 42 is secured to the third bracket 41 by a screw 45.
  • An L-shape engaging member 41b arranged to be engaged to the lower end of a pressing plate 42 is formed at the lower end of the third bracket 41.
  • the elevating frame 31 has a back elevating mechanism 51 shown in FIG. 1.
  • the back elevating mechanism 51 has an elongated box 53 having a drive motor 52 on one side thereof.
  • a first rotational shaft 54 (a drive shaft) is disposed at a lengthwise end of the box 53, while a second rotational shaft 55 is disposed at another end of the same.
  • the box 53 includes a power transmission mechanism (not shown) for transmitting rotations of the drive motor 52 to the first rotational shaft 54.
  • the first rotational shaft 54 is rotated counterclockwise as indicated by an arrow shown in FIGS. 1 and 11A.
  • first raising arms 56 are secured to the two ends of the first rotational shaft 54, while ends of a pair of second raising arms 57 are secured to the two ends of the second rotational shaft 55.
  • Two rollers 58 are, apart from a predetermined distance, rotatively disposed to another end of the first raising arm 56, while one of the rollers 58 is rotatively disposed to another end of the second raising arm 57.
  • Rotations of the first rotational shaft 54 can selectively be transmitted to the second rotational shaft 55 by a power switch mechanism 61.
  • the power switch mechanism 61 is, as shown in FIGS. 11 to 13, formed into a U-shape facing side and comprising a first link 62 having an inside portion formed into an insertion portion 62a. Another end of the first link 62 is rotatively supported by a bracket 63 disposed at another end of the first rotational shaft 54.
  • a through hole 64 penetrating two side wall of the first link 62 is formed at another end of the first link 62.
  • a pair of engaging holes 65b are, apart from an elongated groove 65a by an angle of 90 degrees in the circumferential direction, formed around the through hole 64.
  • the elongated grooves 65a in the two side walls of the first link 62 are shifted from each other by an angle of 90 degrees in the circumferential direction of the through hole 64, while the two engaging hole 65b are formed at the same position.
  • a slide hole 67 is, as shown in FIG. 13, formed in another end portion of the second link 66 in the lengthwise direction.
  • a large-diameter portion 67a is formed at anther end of the slide hole 67.
  • a bent member 62b for inhibiting downward separation of another end of the second link 66 inserted into the insertion portion 62a is disposed on one side wall of the first link 62.
  • the first link 62 and the second link 66 are connected to each other by a block 68 having a flat cross sectional shape. That is, the block 68 is inserted into both of the through hole 64 of the first link 62 and a slide hole 67 of the second link 66. A smaller diameter of the block 68 is made to be substantially the same as the width of the large-diameter portion 67a. Therefore, the block 68 can be rotated in the large-diameter portion 67a.
  • a lever 69 made of synthetic resin is, as shown in FIG. 12A and by a screw 71, secured to the end portion of the projecting block 68.
  • the inner surface of each lever 69 has a first projection 72 slidably engaged into the elongated groove 65a and a conical second projection 73 arranged to be selectively engaged to a pair of engaging holes 65b in accordance with the rotational angle of the lever 69.
  • the second projection 73 is able to elastically engage or removed to and from the engaging hole 65b because a cut portion 74 is formed in the lever 69.
  • the lever 69 When the block 68 is positioned in the large-diameter portion 67a of the slide hole 67, the lever 69 is able to rotate in an angular range of 90 degrees in such a manner that the first projection 72 is moved along the elongated groove 65a.
  • the lever 69 When the lever 69 is in a substantially horizontal state, the block 68 cannot be slid into the slide hole 67. Therefore, the second link 66 cannot slide with respect to the first link 62 attributable to the block 68.
  • the foregoing state is called a "lock state of the power switch mechanism 61".
  • the sliding operation enables the block 68 to be slid with respect to the slide hole 67.
  • the movement of the first link 62 is not transmitted to the second link 66. Therefore, the second rotational shaft 55 is not rotated. That is, the power switch mechanism 61 is capable of transmitting the rotation of the first rotational shaft 54 to the second rotational shaft 55 and interrupting the transmission.
  • the two ends of the first rotational shaft 54 and those of the second rotational shaft 55 are rotatively supported by two receiving portions 75 respectively formed at intermediate portions of the long rod 32 of the elevating frame 31.
  • the receiving portion 75 has a side bracket 76 in the form as shown in FIG. 10A.
  • the side bracket 76 has an expanded portion 77 formed by bending a plate to have a cross sectional shape formed into a substantially U-shape facing side, the expanded portion 77 expanding to the inside portions of the elevating frame 31.
  • the expanded portion 77 has an engaging portion 78 having top and side openings.
  • a bush member 79 having U-shape bearing portion 79a is attached to the engaging portion 78. That is, a flange 81 is formed along a bearing portion 79a on the reverse side of the bush member 79, as shown in FIG. 10B. By engaging the flange 81 to the side surface of the engaging portion 78, the bush member 79 is attached to the expanded portion 77. Moreover, end portions of the first and second rotational shafts 54 are rotatively received by the bearing portion 79a of the bush member 79.
  • each of the rotational shafts 54 and 55 received by the bearing portion 79a is prevented from being separated from the bearing portion 79a by a clip 82 elastically mounted to the top surface of the expanded portion 77.
  • the back elevating mechanism 51 is attached to the elevating frame 31.
  • a pair of holding members 85 for holding a side frames 83 formed as shown in FIG. 4 are formed at intermediate portions of the pair of the long rods 32 of the elevating frame 31.
  • the holding member 85 as shown in FIG. 9, has an upper member 86 bent into a substantially wedge shape, a lower member 87 having an end rotatively connected to the upper member 86 by a pin 88 and formed into a wedge shape, and a screw 89 for connecting and securing the foregoing members.
  • Holding portions 86a and 87a in the recess shape for holding the long rod 32 are formed in the surface of joining between the upper member 86 and the lower member 87. That is, the holding members 85 hold the long rod 32 when the holding members 85 is attached.
  • a holding hole 91 through which the upper member 86 and the lower member 87 are allowed to pass is formed in the other end of the holding members 85 bent downwards.
  • the side frame 83 has a lower portion formed into a dog legged shape, as shown in FIG. 4.
  • the upper portion of the side plate 83 upper than the bent portion of the same is made to be placed vertically.
  • the holding members 85 is bent into a wedge shape and the lower portion of the side frame 83 is bent into the dog legged shape facing side so that the side frame 83 is held in such a manner that considerable outward projection of the holding members 85 over the widthwise end of a base plate 95 is inhibited. Therefore, when the side plate 83 is provided for the side portion of the elevating frame 31, the enlargement of the size of the bed apparatus can be prevented thanks to the holding members 85.
  • the base plate 95 is provided on the elevating frame 31.
  • the base plate 95 is, as shown in FIGS. 1 and 2, divided into five base plate portions along the lengthwise direction of the elevating frame 31. That is, the central portion in the lengthwise direction of the base plate 95 is formed into a fixed base plate portion 95a secured to the elevating frame 31.
  • a hip plate portion 95b and a back plate portion 95c are sequentially and rotatively connected to an end portion of the fixed base plate portion 95a.
  • a first leg plate portion 95d and a second leg plate portion 95e are sequentially and rotatively connected to another end of the fixed base plate portion 95a. End portions of the base plate portions connected rotatively are, as shown in FIGS. 2 and 16A, formed into recesses 96a and projections 96b so as to be engaged to each other. The engaged portions are rotatively connected to each other by a connection shaft 95f.
  • each of the connected base plate portions are formed into projections and pits so that the mattress M is, at the connected portions, bent at two portions X and Y which are an internal edge portion 96c of a recess 96a of the fixed base plate portion 95a and an internal edge portion 96c of the recess 96a of the hip plate portion 95b shown in FIG. 16A.
  • the state where the mattress M is bent at this time is shown in FIG. 16B.
  • the mattress M is, at the connection portion, bent in only portion Z as shown in FIG. 16C so as to be bent to make a predetermined angle.
  • the hip portion of the user is not pressed excessively.
  • this embodiment has the structure such that the end portions for connecting the base plate portions 95a to 95e are formed into projection and pits, only the connection portions of the fixed base plate portion 95a, the hip plate portion 95b and the back plate portion 95c may be formed into projections and pits.
  • Each of the base plate portions 95a to 95e of the base plate 95 has a ventilation hole 98.
  • projection lines 99 are, in the widthwise direction, formed on the top surface of each of the base plate portions 95a to 95e at predetermined intervals.
  • attaching holes 98a for fixing a restraint belt (not shown) for restraining movement of a user on the base plate 95 are formed at two widthwise ends of the hip plate portion 95b and the first and second leg plate portions 95d and 95e.
  • the mattress M is made to easily be slid in the lengthwise direction of the base plate 95 and not to easily be slid in the widthwise direction of the same attributable to the contact with the projection lines 99, raising of the base plate portions 95b to 95e causes the mattress M to smoothly be slid along the projection lines 99. Therefore, also raising of the base plate portions 95b to 95e can smoothly be performed.
  • the projection lines 99 inhibit slippage of the mattress M in the widthwise direction of the base plate 95.
  • a plate-like stopper 100 in contact with an end of the mattress M is provided at the end of the second leg plate portion 95e.
  • the stopper 100 is arranged to inhibit sliding of the mattress M in the direction toward the second leg plate portion 95e when the mattress M has been bent attributable to the rotation of the back plate portion 95c in the raising direction. That is, the mattress M is arranged to be slid in a direction toward the back plate portion 95c.
  • a pair of rollers 58 provided for the first raising arm 56 of the back elevating mechanism 51 are engaged to rails 58a formed on the lower surface of the back plate portion 95c of the base plate 95, as shown in FIG. 3.
  • a roller 58 provided for the first raising arm 56 is in contact with the lower surface of the first leg plate portion 95d.
  • the back plate portion 95c is pressed by the roller 58 and therefore rotated and moved upwards.
  • the hip plate portion 95b synchronizes with the rotation of the back plate portion 95c. As a result, the upper half of the body of the user on the mattress M is raised.
  • the back plate portion 95c raised by the first raising arm 56 is supported by the pair of the rollers 58. Therefore, even if the user leans against the raised back plate portion 95c and moment in a direction indicated by an arrow shown in FIG. 3 acts, the back plate portion 95c does not rotate in the direction indicated by the arrow together with the hip plate portion 95b because the back plate portion 95c is supported by the pair of the rollers 58. That is, the state where the back plate portion 95c is raised can reliably be maintained.
  • An intermediate portion of a holding member 97 formed by bending a wire into a U-shape facing side is rotatively connected to the lower surface of the second leg plate portion 95e.
  • the two ends of the holding member 97 are rotatively connected to the long rod 32 of the elevating frame 31. Therefore, the second leg plate portion 59e arranged to be moved in synchronization with the rotation of the first leg plate portion 95d is held by the holding member 97 in such a manner that a substantially wedge shape is formed together with the first leg plate portion 95d.
  • An intermediate portion of the holding member 97 is elastically and rotatively inserted into two attaching portions 151 (only one attaching portion 151 is illustrated) disposed on the lower surface of the second leg plate portion 95e, as shown in FIG. 17. That is, each of the base plate portions 95a to 95e of the base plate 95 is formed into a hollow shape by blow-molding synthetic resin, as shown in FIGS. 17 and 18. When the molding operation is performed, the attaching portions 151 are simultaneously formed.
  • connection shaft 95f for connecting the adjacent base plate portions is, as shown in FIG. 19D, inserted through a first insertion hole 153 formed at a widthwise end of each base plate portion.
  • the first insertion hole 153 is opened in a recess 152 formed in a widthwise end surface of the base plate portion.
  • a first cap 154 in the form of a semicircle as shown in FIG. 19B is attached to the recess 152.
  • a plurality of claws 155 are formed to project over the inner surface of the first cap 154.
  • the leading end of the claws 155 penetrates the first insertion hole 153 to be engaged to the inner surface of the recess 152.
  • separation of the connection shaft 95f inserted into the base plate portion through the first insertion hole 153 can be prevented by the first cap 154.
  • a reinforcing member 161 is inserted into each of the base plate portions formed into a hollow shape by blow molding. Similarly to the connection shaft 95f, the reinforcing member 161 is inserted through a second insertion hole 162 formed at a widthwise end of the base plate portion (see FIG. 19D).
  • the second insertion hole 162 is formed in a recess 152a.
  • a second cap 163 in a rectangular shape as shown in FIG. 19C is attached to the recess 152a.
  • a claw 164 is formed to project over the second cap 163. The leading end of the claw 164 is engaged to the inner surface of the recess 152.
  • the reinforcing member 161 is integrally formed with each of the base plate portion by a pair of support portions 165 (only one of the support portions 165 is illustrated) formed integrally with the two widthwise end of each base plate portion, as shown in FIG. 19A.
  • the support portion 165 is formed to have a cross sectional shape capable of penetrating the reinforcing member 161 by integrally forming a lower wall 166 of the hollow base plate portion with the inner surface of an upper wall 167 to form a pair of ribs 168.
  • each base plate portion is a hollow shape
  • the reinforcing member 161 inserted and held by the support portions 165 is integrally provided with the base plate portion. Therefore, the base plate portion can reliably be reinforced. Since the top surface of each of the hollow base plate portion is as well as reinforced by the projection lines 99 formed on each of the top surfaces of the base plate portions, deflection cannot easily be generated even a load is applied.
  • the back elevating mechanism 51 is provided with a damper mechanism 101 for preventing rapid inclination of the back plate portion 95c which has been rotated upwards by the first raising arm 56.
  • the damper mechanism 101 has a gas spring 102.
  • An end of the gas spring 102 is, as shown in FIGS. 11A, 14 and 15, attached to a bracket 103 secured to the first rotational shaft 54.
  • a block 104 in a U-shape facing side provided at the leading end of a rod 102a of the gas spring 102 is rotatively connected to a connector 105 rotatively attached to the second rotational shaft 55.
  • the rod 102a has substantially no resistance when it slides in the projecting direction and resistance when it slides in the introduction direction.
  • the connector 105 is composed of an upper member 105a and a lower member 105b connected to each other by a screw 106 in such a manner that they can be decomposed.
  • a pair of attaching members 108 running parallel to each other are stood erect on the upper member 105a.
  • An attaching member 109 having a cross sectional shape formed into a U-shape facing side and arranged to be inserted into the block 104 is formed between the attaching members 108.
  • a through hole 110 is formed in each of the attaching members 108, the attaching member 109 and the block 104.
  • the block 104 is connected to the connector 105 by a support shaft 111 inserted into the through hole 110.
  • the block 104 connected to the connector 105 is slightly rotated so that an inner surface 104a in the intermediate portion of the block 104 is attached to an outer surface 105c in the intermediate portion of an attaching member 109.
  • a lower end surface 104b is attached to an upper surface 105d of the upper member 105a.
  • the back plate portion 95c is sometimes intended to be rapidly rotated in the inclining direction attributable to the load of the user.
  • the rod 102a of the gas spring 102 has resistance against sliding in the introducing direction, rapid inclination of the back plate portion 95c can be prevented.
  • the gas spring 102 is synchronously operated with the rotation of the first rotational shaft 54. Since the connector 105 to which the rod 102a of the gas spring 102 is attached is not rotated with respect to the second rotational shaft 55, rotation of the first rotational shaft 54 is not transmitted to the second rotational shaft 55 through the gas spring 102.
  • the damper mechanism 101 does not transmit the rotation of the first rotational shaft 54 to the second rotational shaft 55 when the power switch mechanism 61 is in a suspended state.
  • the bed apparatus having the foregoing structure such that the base frame 1 is formed into the rectangular shape by connecting the ends of the long frames 2 and those of the short frames 3 by the first connection members 4. That is, the first insertion portion 5 and the second insertion portion 6 are integrally formed with the first connection member 4. Moreover, the ends of the long frame 2 and the short frame 3 respectively are inserted into each of the insertion portions 5 and 6. Thus, the rectangular base frame 1 is formed.
  • the base frame 1 can be assembled by simply inserting and securing the rods 2 and 3 into the insertion portions 5 and 6. Since no welding operation is required as has been performed with the conventional structure, the base frame 1 can easily be assembled without skill. Since the assembling operation can easily be completed, the bed apparatus in a decomposed state can be delivered from a manufacturing plant and a purchaser is able to assemble the base frame 1 at a place, for example, the home of the purchaser, at which the bed apparatus is placed. Therefore, the size of the package of the apparatus when transported can be reduced so that handling, including transportation and horizontal carry, is made easier.
  • the first connection member 4 of the base frame 1 has the attaching portion 7 for attaching the second arm 19 of the elevation mechanism 11 and the attaching hole 9 for attaching the caster 8 which are integrally formed together with the first and second insertion portions 5 and 6. Therefore, elements only for attaching the second arm 19 and the caster 8 are not required so that the number of elements is reduced and thus the cost is reduced. Moreover, the assembling operation can be facilitated.
  • the elevating frame 31 is, similar to the base frame 1, assembled into a rectangular shape by inserting and securing the ends of the long rod 32 and the short rod 33 to the first and second insertion portions 36 and 37 provided for the second connection member 34.
  • the elevating frame 31 can easily be assembled without a welding operation.
  • the assembling operation can be performed without skill. Therefore, the bed apparatus in a decomposed state can be delivered from a manufacturing plant and a purchaser is able to assemble the base frame 1 at a place at which the bed apparatus is placed.
  • the size of the package of the apparatus when transported can be reduced so that handing, including transportation and horizontal carry, is made easier.
  • the second connection member 34 has the holding hole 39 formed integrally in order to attach the head board 37a and the foot board 38a. Therefore, elements for only attaching the boards 37a and 38a are not required. As a result, the number of elements can be decreased so that structure is simplified and the cost is reduced.
  • the elevating frame 31 is provided with the back elevating mechanism 51 which moves the first raising arm 56 and the second raising arm 57 in the raising direction.
  • the back plate portion 95c, hip plate portion 95b and first and second leg plate portions 95d and 95e of the base plate 95 can be moved upwards.
  • the rotation of the drive motor 52 can be transmitted to the second raising arm 57 or the transmission can be interrupted.
  • the lever 69 of the power switch mechanism 61 is operated to realize a state where the block 68 is able to slide with respect to the slide hole 67 so that transmission of the rotations of the drive motor 52 to the second raising arm 57 is interrupted.
  • the first raising arm 56 is operated while inhibiting the operation of the second raising arm 57 so that the back plate portion 95c and the hip plate portion 95b arranged to be operated in synchronization with the back plate portion 95c are raised by the first raising arm 56 to raise the upper half of the body of the user.
  • the lever 69 of the power switch mechanism 61 is rotated by 90 degrees to inhibit sliding of the block 68 with respect to the slide hole 67.
  • the second link 66 can be synchronized with the operation of the first link 62 so that the rotations of the drive motor 52 are transmitted to the second raising arm 57 as well as to the first raising arm 56.
  • the first leg plate portion 95d is raised.
  • the second leg plate portion 95e is synchronously operated so that the foregoing base plate portion is bent into a substantially wedge shape.
  • the leg portion of the user is bent into a substantially wedge shape so that slippage of the body of the user attributable to the bent leg portion is inhibited when the upper half of the body of the user has been raised.
  • the mattress M is bent at the internal edge portion 96c of the recess 96a of the fixed base plate portion 95a and at the internal edge portion 96c of the recess 96a of the hip plate portion 95b.
  • the mattress M is warped with a curvature larger than that in a case where the connection portions of the fixed base plate portion 95a and hip plate portion 95b are not formed into the projections and pits.
  • the portion of the user from the hip to the back of the user corresponding to the connection portion of the fixed base plate portions 95a and 95b cannot be pressed considerably.
  • the base plate 95 is divided into five base plate portions, and the back plate portion 95c is pushed up by the roller 58 provided for the first raising arm 56 when the base plate portion is raised.
  • the hip plate portion 95b is provided between the back plate portion 95c and the fixed base plate portion 95a, the first raising arm 56 pushes up only the internal edge portion 96c.
  • the back plate portion 95c is raised while being bent at the connection portion between the back plate portion 95c and the hip plate portion 95b. Therefore, an angle of raising of the back plate portion 95c is made to be larger than that of the hip plate portion 95b. That is, the hip plate portion 95b is positioned between the fixed base plate portion 95a and the back plate portion 95c while making a raising angle to be more gentle than that of the back plate portion 95c.
  • the portion of the mattress M placed on the base plate 95 corresponding to the hip of the user cannot easily be bent because the raising angle of the hip plate portion 95b is smaller than that of the back plate portion 95c.
  • the hip of the user on the mattress M cannot be held by the mattress M when the base plate portion is raised so that the hip is not pressed with the compressive force generated in the upper portion of the mattress M.
  • Each of the base plate portions 95a to 95e of the base plate 95 has the projection lines 99 formed in the lengthwise direction at predetermined intervals in the widthwise direction so that the slippage of the mattress M placed on the base plate 95 in the lengthwise direction is inhibited. Therefore, when, for example, the back plate portion 95c is raised, the mattress M bent attributable to the raising operation is smoothly slid with respect to the base plate 95. As a result, load applied to the back elevating mechanism 51 when the base plate portion is raised cannot be enlarged. Moreover, the mattress M is not bent in such a manner that it separates from the top surface of the base plate 95.
  • FIGS. 20 to 23 A second embodiment of the present invention will now be described with reference to FIGS. 20 to 23. Note that the same elements as those according to the first embodiment are given the same reference numerals and the same elements are omitted from description.
  • the second embodiment is different from the first embodiment in the structure of the back elevating mechanism 51 and that of the hip plate portion 95b.
  • the back elevating mechanism 51 has a power source 252.
  • a drive shaft 253 is attached to the power source 252, and the drive shaft 253 is arranged to be moved in the axial direction by the power source 252.
  • the power source 252 is attached to a horizontal rod 255 arranged between a pair of support members 254 running parallel to each other.
  • Each of the first rasising arms 56 is made of a rectangular pipe member.
  • a portion of a synthetic block 256 is inserted into the two ends of the support members 254.
  • the two ends of the block 256 are held by a U-shape metal band 258 secured to the upper and lower surfaces of the support members 254 with screws 257.
  • Two intermediate portions of the first rotational shaft 54, 259 are rotatively supported by the pair of the blocks 256 provided on either end of the pair of support members 254, while two intermediate portions of the second rotational shaft 55 are rotatively supported by the pair of the blocks 256 provided for the other end.
  • An end of an arm 262 is secured to the central portion of the first rotational shaft 54, 259 in the axial direction, while a collar 263 is rotatively mounted on each of the two ends of the first rotational shaft 54.
  • a leading end of the drive shaft 253 of the power source 252 is rotatively connected to another end of the arm 262.
  • a base portion of the first raising arm 56 made of an inverted U-shape member having an opened lower surface is secured to the collar 263.
  • the pair of receiving rollers 58 are rotatively provided for the outer surface of the leading end of the first raising arm 56, while a receiving member 266 is inserted and secured into the base portion of the receiving roller 58 in such a manner that a portion of the receiving member 266 projects over the lower surface of the base portion.
  • a synchronous arm 267 projecting toward the first raising arm 56 and a hip raising arm 268 projecting toward the support members 254 are provided for the portion of the two ends of the first rotational shaft 54, 259 inner than the first raising arm 56 in such a manner that one end of the arms is secured.
  • a pin 269 arranged to be engaged to the lower surface of the receiving member 266 is provided for the leading end of the synchronous arm 267, as shown in FIG. 22B.
  • a first push-up roller 270 is rotatively provided for the leading end of the hip raising arm 268.
  • the base portion of the second raising arm 57 is secured to each of the two ends of the second rotational shaft 55, 261.
  • the second push-up roller 58 is rotatively provided for the leading end of the second raising arm 57.
  • the rotation of the first rotational shaft 54 can selectively be transmitted to the second rotational shaft 55 by a power switch mechanism 61 having the same structure as that according to the first embodiment.
  • the hip plate portion 95b of the base plate 95 is, as shown in FIGS. 20 and 21, composed of a pair of side portions 213 having a stepped portion 213a on the inside thereof and a hip raising member 214 disposed between the side portions 213 and having two widthwise ends which are engaged to the stepped portion 213a.
  • the pair of the side portions 213 are rotatively connected to the side portions of the back plate portion 95c.
  • One side of the hip raising member 214 is rotatively connected to one side of the back plate portion 95c. Therefore, the hip raising member 214 is able to be rotated upwards relative to an end thereof connected to the back plate portion 95c.
  • a first push-up roller 270 provided for the leading end of the hip raising arm 268 of the back elevating mechanism 51 is, a shown in FIGS. 23A and 23B, placed to oppose the lower surface of the hip raising member 214. Therefore, when a first rotational shaft 54, 259 of the back elevating mechanism 51 is rotated clockwise which is the opposite direction to the counterclockwise direction indicated by an arrow shown in FIG. 22A, only the hip raising member 214 of the hip plate portion 95b is rotated in the raising direction.
  • the back elevating mechanism 51 provided for the elevating frame 31 is operated. That is, the power source 252 for the back elevating mechanism 51 is operated so that the first rotational shaft 259 is rotated counterclockwise. As a result, the synchronous arm 267 is rotated in the raising direction so that the through hole 64 is rotated in the raising direction by the pin 269 provided for the synchronous arm 267.
  • the receiving roller 58 provided for the first raising arm 56 is engaged to the rail 58a provided for the lower surface of the back plate portion 95c, the back plate portion 95c is pushed upwards. Therefore, the upper half of the body of the user positioned on the back plate portion 95c can be raised.
  • the rotation of the first rotational shaft 54, 259 can be transmitted to the second rotational shaft 55 by the power switch mechanism 61 and transmission can be interrupted by the same.
  • the first leg plate portion 95d and the second leg plate portion 95e are not rotated and the flat state is maintained even if the back plate portion 95c is raised as shown in FIG. 23C.
  • the bed apparatus can be used in such a manner that the rotation of the first rotational shaft 54 is not transmitted to the second rotational shaft 55 when the base plate portion is raised.
  • the hip raising member 214 of the hip plate portion 95b is rotated in the raising direction by the first push-up roller 270 provided for the leading end of the hip raising arm 268.
  • the hip raising member 214 pushes upwards the hip of the user U on the mattress M.
  • a structure in which the hip raising member 214 is raised at predetermined intervals when the back plate portion 95c is not raised enables bed sore of the user U to be prevented.
  • the back elevating mechanism 51 when used to raise the hip raising member 214, the internal edge portion 96c substantially horizontally supported by the elevating frame 31 is not raised or moved downwards but only the hip raising member 214 can be raised. Therefore, the hip of the user U can reliably be raised by the hip raising member 214 so that pressure of the body of the user U against the mattress M is lowered.
  • the hip raising member 214 can be raised or lowered by the back elevating mechanism 51, a drive mechanism for only this operation can be omitted from the structure. That is, the hip raising member 214 can be raised and lowered without a complicated structure.

Landscapes

  • Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Invalid Beds And Related Equipment (AREA)
EP96117078A 1995-11-10 1996-10-24 Bed apparatus Expired - Lifetime EP0778016B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP29296595A JP3343472B2 (ja) 1995-11-10 1995-11-10 ベッド装置
JP292965/95 1995-11-10
JP29296595 1995-11-10

Publications (3)

Publication Number Publication Date
EP0778016A2 EP0778016A2 (en) 1997-06-11
EP0778016A3 EP0778016A3 (enrdf_load_stackoverflow) 1997-06-25
EP0778016B1 true EP0778016B1 (en) 2003-04-02

Family

ID=17788728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117078A Expired - Lifetime EP0778016B1 (en) 1995-11-10 1996-10-24 Bed apparatus

Country Status (4)

Country Link
US (1) US5862551A (enrdf_load_stackoverflow)
EP (1) EP0778016B1 (enrdf_load_stackoverflow)
JP (1) JP3343472B2 (enrdf_load_stackoverflow)
DE (1) DE69627112T2 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
EP0778016A3 (enrdf_load_stackoverflow) 1997-06-25
EP0778016A2 (en) 1997-06-11
DE69627112T2 (de) 2004-02-05
JP3343472B2 (ja) 2002-11-11
JPH09131379A (ja) 1997-05-20
US5862551A (en) 1999-01-26
DE69627112D1 (de) 2003-05-08

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